<template>
  <div>
    <div style="margin: 10px 0">
      <label for="name" class="search-label">名称</label>
      <el-input
        style="width: 200px"
        placeholder="请输入名称"
        suffix-icon="el-icon-search"
        v-model="name"
        clearable
      ></el-input>
      <el-button
        type="primary"
        icon="el-icon-search"
        @click="load"
        style="margin-left: 10px"
        >搜索</el-button
      >
      <el-button icon="el-icon-refresh" @click="reset">重置</el-button>
    </div>

    <div style="margin: 10px">
      <el-button type="primary" plain icon="el-icon-plus" size="mini" @click="handleAdd"
        >新增</el-button
      >
      <el-popconfirm
        class="ml-5"
        confirm-button-text="确定"
        cancel-button-text="我再想想"
        icon="el-icon-info"
        icon-color="red"
        title="您确定批量删除这些数据吗？"
        @confirm="delBatch"
      >
        <el-button type="danger" slot="reference" plain icon="el-icon-delete" size="mini"
          >批量删除</el-button
        >
      </el-popconfirm>
      <!--      <el-upload action="http://localhost:9090/user/import" :show-file-list="false" accept="xlsx" :on-success="handleExcelImportSuccess" style="display: inline-block">-->
      <!--        <el-button type="primary" class="ml-5">导入 <i class="el-icon-bottom"></i></el-button>-->
      <!--      </el-upload>-->
      <!--      <el-button type="primary" @click="exp" class="ml-5">导出 <i class="el-icon-top"></i></el-button>-->
    </div>

    <el-table :data="tableData" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55"></el-table-column>
      <el-table-column prop="id" label="ID" width="80" align="center"></el-table-column>
      <el-table-column prop="name" label="名称" align="center"></el-table-column>
      <el-table-column prop="flag" label="唯一标识" align="center"></el-table-column>
      <el-table-column prop="description" label="描述" align="center"></el-table-column>
      <el-table-column label="操作" width="280" align="center">
        <template slot-scope="scope">
          <el-button
            type="warning"
            plain
            icon="el-icon-menu"
            @click="selectMenu(scope.row)"
            >分配菜单</el-button
          >
          <el-button
            type="success"
            plain
            icon="el-icon-edit"
            @click="handleEdit(scope.row)"
            >编辑
          </el-button>
          <el-popconfirm
            class="ml-5"
            confirm-button-text="确定"
            cancel-button-text="我再想想"
            icon="el-icon-info"
            icon-color="red"
            title="您确定删除吗？"
            @confirm="del(scope.row.id)"
          >
            <el-button type="danger" plain icon="el-icon-delete" slot="reference"
              >删除
            </el-button>
          </el-popconfirm>
        </template>
      </el-table-column>
    </el-table>
    <div style="padding: 10px 0">
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="pageNum"
        :page-sizes="[2, 5, 10, 20]"
        :page-size="pageSize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
        background
      >
      </el-pagination>
    </div>

    <el-dialog title="角色信息" :visible.sync="dialogFormVisible" width="30%">
      <el-form ref="form" :model="form" :rules="rules" label-width="80px" size="small">
        <el-form-item label="角色名称" prop="name">
          <el-input v-model="form.name" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="唯一标识">
          <el-input v-model="form.flag" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="form.description" autocomplete="off"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="save">确 定</el-button>
      </div>
    </el-dialog>

    <el-dialog title="菜单分配" :visible.sync="menuDialogVis" width="30%">
      <el-tree
        :props="props"
        :data="menuData"
        show-checkbox
        node-key="id"
        ref="tree"
        :default-expanded-keys="expends"
        :default-checked-keys="checks"
      >
        <span class="custom-tree-node" slot-scope="{ node, data }">
          <span><i :class="data.icon"></i> {{ data.name }}</span>
        </span>
      </el-tree>
      <div slot="footer" class="dialog-footer">
        <el-button @click="menuDialogVis = false">取 消</el-button>
        <el-button type="primary" @click="saveRoleMenu">确 定</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: "Role",
  data() {
    return {
      rules: {
        name: [{ required: true, message: "角色名称不能为空", trigger: "blur" }],
      },
      tableData: [],
      total: 0,
      pageNum: 1,
      pageSize: 10,
      name: "",
      form: {},
      dialogFormVisible: false,
      menuDialogVis: false,
      multipleSelection: [],
      menuData: [],
      props: {
        label: "name",
      },
      expends: [],
      checks: [],
      roleId: 0,
      roleFlag: "",
      ids: [],
    };
  },
  created() {
    this.load();
  },
  methods: {
    load() {
      this.request
        .get("/role/page", {
          params: {
            pageNum: this.pageNum,
            pageSize: this.pageSize,
            name: this.name,
          },
        })
        .then((res) => {
          this.tableData = res.data.records;
          this.total = res.data.total;
        });

      this.request.get("/menu/ids").then((r) => {
        this.ids = r.data;
      });
    },
    save() {
      this.$refs["form"].validate((valid) => {
        if (valid) {
          this.request.post("/role", this.form).then((res) => {
            if (res.code === "200") {
              this.$message.success("保存成功");
              this.dialogFormVisible = false;
              this.load();
            } else {
              this.$message.error("保存失败");
            }
          });
        }
      });
    },
    saveRoleMenu() {
      this.request
        .post("/role/roleMenu/" + this.roleId, this.$refs.tree.getCheckedKeys())
        .then((res) => {
          if (res.code === "200") {
            this.$message.success("绑定成功");
            this.menuDialogVis = false;

            // 操作管理员角色后需要重新登录
            if (this.roleFlag === "ROLE_ADMIN") {
              this.$store.commit("logout");
            }
          } else {
            this.$message.error(res.msg);
          }
        });
    },
    handleAdd() {
      this.dialogFormVisible = true;
      this.form = {};
    },
    handleEdit(row) {
      this.form = JSON.parse(JSON.stringify(row));
      this.dialogFormVisible = true;
    },
    del(id) {
      this.request.delete("/role/" + id).then((res) => {
        if (res.code === "200") {
          this.$message.success("删除成功");
          this.load();
        } else {
          this.$message.error("删除失败");
        }
      });
    },
    handleSelectionChange(val) {
      console.log(val);
      this.multipleSelection = val;
    },
    delBatch() {
      let ids = this.multipleSelection.map((v) => v.id); // [{}, {}, {}] => [1,2,3]
      this.request.post("/role/del/batch", ids).then((res) => {
        if (res.code === "200") {
          this.$message.success("批量删除成功");
          this.load();
        } else {
          this.$message.error("批量删除失败");
        }
      });
    },
    reset() {
      this.name = "";
      this.load();
    },
    handleSizeChange(pageSize) {
      console.log(pageSize);
      this.pageSize = pageSize;
      this.load();
    },
    handleCurrentChange(pageNum) {
      console.log(pageNum);
      this.pageNum = pageNum;
      this.load();
    },
    async selectMenu(role) {
      this.roleId = role.id;
      this.roleFlag = role.flag;

      // 请求菜单数据
      this.request.get("/menu").then((res) => {
        this.menuData = res.data;

        // 把后台返回的菜单数据处理成 id数组
        this.expends = this.menuData.map((v) => v.id);
      });

      this.request.get("/role/roleMenu/" + this.roleId).then((res) => {
        this.checks = res.data;
        this.ids.forEach((id) => {
          if (!this.checks.includes(id)) {
            // 可能会报错：Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'setChecked')
            this.$nextTick(() => {
              this.$refs.tree.setChecked(id, false);
            });
          }
        });
        this.menuDialogVis = true;
      });
    },
  },
};
</script>

<style>
.headerBg {
  background: #eee !important;
}
.search-label {
  font-size: 14px;
  color: #606266;
  margin-right: 7px;
  margin-left: 10px;
}
</style>
